build script fixes

README.md

@@ -12,12 +12,26 @@ This is a set of scripts for patching a Chrome OS RMA shim to serve as a bootloa
 - ~~autostart X11~~
 - ~~host repo for patched systemd packages~~
 - ~~use debootstrap to install debian~~
-- prompt user for hostname and account when creating the rootfs
+- ~~prompt user for hostname and account when creating the rootfs~~
 - auto load iwlmvm
+- get wifi fully working
 - host prebuilt images
 - write detailed documentation
 
+### Long Term Goals:
+- get zram to work
+- eliminate binwalk dependency
+- get audio to work
+
 ## Usage:
+
+### Prerequisites:
+- A seperate Linux PC for the build process (preferably something Debian-based)
+- A USB that is at least 8GB in size
+- At least 20GB of free disk space
+- An x86-based Chromebook
+
+### Instructions:
 1. Grab a Chrome OS RMA Shim from somewhere. Most of them have already been leaked and aren't too difficult to find.
 2. Download a Chrome OS [recovery image](https://chromiumdash.appspot.com/serving-builds?deviceCategory=ChromeOS) for your board.
 3. Clone this repository and cd into it.

bootloader/bin/bootstrap.sh

@@ -127,7 +127,7 @@ boot_target() {
   mkdir -p /newroot/bootloader
   pivot_root /newroot /newroot/bootloader
   local tty="/dev/pts/0"
-  exec /sbin/init 5 < "$tty" >> "$tty" 2>&1
+  exec /sbin/init < "$tty" >> "$tty" 2>&1
 }
 
 main() {

build.sh

@@ -15,7 +15,7 @@ print_help() {
 }
 
 check_deps() {
-  local needed_commands="cpio binwalk pcregrep realpath cgpt mkfs.ext4 mkfs.ext2 fdisk"
+  local needed_commands="cpio binwalk pcregrep realpath cgpt mkfs.ext4 mkfs.ext2 fdisk rsync"
   for command in $needed_commands; do
     if ! command -v $command &> /dev/null; then
       echo $command
@@ -89,9 +89,9 @@ patch_initramfs $initramfs_dir
 
 echo "creating disk image"
 rootfs_size=$(du -sm $rootfs_dir | cut -f 1)
-rootfs_part_size=$(($rootfs_size * 11 / 10 + 50))
+rootfs_part_size=$(($rootfs_size * 11 / 10))
 #create a 20mb bootloader partition
-#rootfs partition is 10% larger than its contents
+#rootfs partition is 20% larger than its contents
 create_image $output_path 20 $rootfs_part_size
 
 echo "creating loop device for the image"
@@ -110,4 +110,5 @@ populate_partitions $image_loop $initramfs_dir $rootfs_dir
 
 echo "cleaning up loop devices"
 losetup -d $shim_loop
-losetup -d $image_loop
+losetup -d $image_loop
+echo "done"

build_image.sh

@@ -66,7 +66,7 @@ partition_disk() {
 
     #write changes
     echo w
-  ) | fdisk $image_path
+  ) | fdisk $image_path > /dev/null
 }
 
 safe_mount() {
@@ -112,7 +112,7 @@ populate_partitions() {
   #write rootfs to image
   local rootfs_mount=/tmp/new_rootfs
   safe_mount "${image_loop}p4" $rootfs_mount
-  cp -r $rootfs_dir/* $rootfs_mount
+  rsync --archive --human-readable --hard-links --info=progress2 --sparse $rootfs_dir/ $rootfs_mount/
   umount $rootfs_mount
 }
 
@@ -123,7 +123,8 @@ create_image() {
   
   #stateful + kernel + bootloader + rootfs
   local total_size=$((1 + 32 + $bootloader_size + $rootfs_size))
-  dd if=/dev/zero of=$image_path bs=1M oflag=sync count=$total_size status=progress
+  rm -rf "${image_path}"
+  fallocate -l "${total_size}M" "${image_path}"
 
   partition_disk $image_path $bootloader_size
 }

rootfs/etc/modules-load.d/wifi.conf

@@ -0,0 +1 @@
+iwlmvm